Speed :Unless otherwise stated by traffic signs, the general rules are

City

50 km/h

Outside cities

90 km/h

Highways

120 km/h

Right of way :The general rule, if no traffic sign is present, is that vehicles coming from the right have the right of way.

Exceptions :- Roundabouts, the vehicle in the roundabout always has the right of way- If you are driving on a main road indicated by the usual traffic signs

Fees :- Roads are free of charge in Belgium- Speed tickets and other fees will have to be paid on site. The vehicle will be immobilized until fees are paid. The police forces do accept card payments !!- If caught by a speed camera, you will get the ticket (or not) depending on your origin country